1. Standard size and weight Our pitch training baseballs are precision crafted to match the official standard size and weight. They have a circumference of approximately 9 inches, a diameter of 2.8 inches, and a suitable weight for training and real game scenarios. They are suitable for a wide range of drills and practice situations. 2. High quality design The baseballs combine a sturdy rubber core with an elastic PVC outer shell to deliver durability and reliable performance through long-term, frequent use. This construction supports consistent feel and rebound, helping you train with confidence. 3. Accelerated learning with fingerprint grip system An innovative fingerprint marking system helps you identify and practice grips for fastballs, curveballs, sliders, and more. The system is designed to speed up the learning process by providing clear guidance on grip placement. 4. Versatile training aid Designed for both left-handed and right-handed users, with fingerprints that accommodate a variety of grips. This enhances versatility and supports progressive skill development for pitchers of all styles. 5. Use scenarios - Solo practice at home or on the field: practice different grips using the fingerprint guides and work on accuracy and release consistency. - Team bullpen or warm-up sessions: use during routine warm-ups to build muscle memory and grip consistency across players. - Skill progression drills: follow the fingerprint guidance to add and refine new pitch types as you advance, with a measurable path from fastballs to breaking pitches.